US Patent 9738243 Airbag device for driver's seat

An airbag device for a driver's seat, includes: a steering wheel; a wheel pad portion; a main body airbag that is configured to receive a supply of gas and to be inflated and deployed at a vehicle rear side of the steering wheel; a side portion chamber that is provided at a side portion in a vehicle transverse direction of the main body airbag, and that is configured to receive a supply of gas from the main body airbag and to be inflated and deployed from the side portion of the main body airbag toward the vehicle rear side; and a regulating tether that connects the main body airbag to a rear portion or a front-rear direction intermediate portion of the side portion chamber, and that restricts the side portion chamber from collapsing toward a side removed from a center of the main body airbag in the vehicle transverse direction.